Introduction: The longest axes of the upper and lower articular surfaces of the humerus make an angle with each other of little more than 90°.
In man however the upper end of the humerus appears to have been rotated laterally, so that the angle between the two axes has been increased to about 164°. This angulation is referred to as the angle of â€śhumeral torsionâ€ś. When the two axes are superimposed on each other, they form an angle known as â€śtorsion angle â€ś.
Methodology: Present study was conducted on two hundred humeri collected from medical college, Baroda. Out of these 105 were of the right side and 95 were of the left side. The gender of the bones was also determined...
Observations: The humeral torsion is greater in the male than in the female and greater on right side than left side humeri possibly because most individuals are right handed. The present study showed no correlation between the torsion angle and the length of the humerus.
Angle of humeral torsion, Articular Surface